Eruptions of the Yellowstone volcanic system have included the two largest volcanic eruptions in North America in the past few million years; the third largest was at Long Valley in California and produced the Bishop ash bed.
On the diesel Passat, the TDI badge stands for Turbocharged Direct Injection, which isn't really all that helpful as the gasoline-powered Passat is also turbocharged and also uses direct injection. Volkswagen attempts to clear this up by calling this Passat the Passat TDI Clean Diesel.
Best Answer: HPI is a company that keep track of vehicle history. HPI Clear means that the vehicle has a clean history. It basically means that it would cost more to repair your vehicle than the retail value of the car. The insurance company will not spend that money and will total the car and offer you a settlement for the appraised value of the car before the accident. Good luck! Hpi What Does It Mean.